Abstract
Quantitative reconstructions of mean July temperatures (T jul) based on new and previously published pollen-stratigraphical data covering the last 2000 years from 11 lakes in northern Fennoscandia and the Kola Peninsula are presented. T jul values are based on a previously published pollen-climate transfer function for the region with a root-mean-square error of prediction (RMSEP) of 0.99°C. The most obvious trend in the inferred temperatures from all sites is the general decrease in T jul during the last 2000 years. Pollen-inferred T jul values on average 0.18 ± 0.56°C (n = 91) higher than present (where “present” refers to the last three decades based on pollen-inferred T jul in core-top samples) are indicated between 0 and 1100 AD (2000–850 cal year BP), and temperatures −0.2 ± 0.47°C (n = 78) below present are inferred between 1100 and 1900 AD (850–50 cal year BP). No consistent temperature peak is observed during the ‘Medieval Warm Period’, ca. 900–1200 AD (1100–750 cal year BP), but the cooler period between 1100 and 1900 AD (850–50 cal year BP) corresponds in general with the ‘Little Ice Age’ (LIA). Consistently with independent stable isotopic data, the composite pollen-based record suggests that the coldest periods of the LIA date to 1500–1600 AD (450–350 cal year BP) and 1800–1850 AD (150–100 cal year BP). An abrupt warming occurred at about 1900 AD and the twentieth century is the warmest century since about 1000 AD (950 cal year BP).
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Notes
The pollen and radiocarbon data are available on-line through the World Data Center for Paleoclimatology (ftp://ftp.ncdc.noaa.gov/pub/data/paleo/europe/fennoscandia2008pollen.txt).
References
Bakke J, Lie Ø, Dahl SO, Nesje A, Bjune AE (2008) Strength and spatial patterns of the Holocene wintertime westerlies in the NE Atlantic region. Global Planet Change 60:28–41. doi:10.1016/j.gloplacha.2006.07.030
Barnekow L (1999) Holocene tree-line dynamics and inferred climatic changes in the Abisko area, northern Sweden, based on macrofossil and pollen records. Holocene 9:253–265. doi:10.1191/095968399676322637
Barnekow L (2000) Holocene regional and local vegetation history and lake-level changes in the Torneträsk area, northern Sweden. J Paleolimnol 23:399–420. doi:10.1023/A:1008171418429
Berger AL, Loutre MF (1991) Insolation values for the climate of the last 10 million years. Quat Sci Rev 10:297–317. doi:10.1016/0277-3791(91)90033-Q
Bergman J, Hammarlund D, Hannon G, Barnekow L, Wohlfarth B (2005) Deglacial vegetation succession and Holocene tree-limit dynamics in the Scandes Mountains, west-central Sweden: stratigraphic data compared to megafossil evidence. Rev Palaeobot Palynol 134:129–151. doi:10.1016/j.revpalbo.2004.12.005
Bigler C, Larocque I, Peglar SM, Birks HJB, Hall RI (2002) Quantitative multiproxy assessment of long-term patterns of Holocene environmental change from a small lake near Abisko, northern Sweden. Holocene 12:481–496. doi:10.1191/0959683602hl559rp
Bigler C, Barnekow L, Heinrichs ML, Hall RI (2006) Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, northern Sweden) reconstructed using biological proxy indicators. Veg Hist Archaeobot 15:309–320. doi:10.1007/s00334-006-0054-x
Birks HJB (1998) Numerical tools in palaeolimnology—progress, potentialities, and problems. J Paleolimnol 20:307–332. doi:10.1023/A:1008038808690
Birks HJB, Seppä H (2004) Pollen-based reconstructions of the late-quaternary climate in Europe—progress, problems, and pitfalls. Acta Palaeobot 44:317–334
Bjune AE (2005) Holocene vegetation history and tree-line changes on a north–south transect crossing major climate gradients in southern Norway—evidence from pollen and plant macrofossils in lake sediments. Rev Palaeobot Palynol 133:249–275. doi:10.1016/j.revpalbo.2004.10.005
Bjune AE, Birks HJB (2008) Holocene vegetation dynamics and inferred climate changes at Svanåvatnet, Mo i Rana, northern Norway. Boreas 37:146–156
Bjune AE, Birks HJB, Seppä H (2004) Holocene vegetation and climate history on a continental—oceanic transect in northern Fennoscandia based on pollen and plant macrofossils. Boreas 33:211–223. doi:10.1080/03009480410001244
Bradley RS, Hughes MK, Diaz HF (2003) Climate in medieval time. Science 302:404–405. doi:10.1126/science.1090372
Cleveland WS (1979) Robust locally-weighted regression and smoothing scatter plots. J Am Stat Assoc 74:829–836. doi:10.2307/2286407
Cubash U, Meehl GA, Boer GJ, Stouffer RJ, Dix M, Noda A et al (2001) Projections of future climate change. In: Houghton JT et al (eds) Climate change 2001: the scientific basis. Contribution of working group I to the third assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp 525–582
Dahl E (1988) The phytogeography of northern Europe (British isles, fennoscandia and adjacent areas). Cambridge University Press, Cambridge
Dahl SO, Nesje A (1996) A new approach to calculating Holocene winter precipitation by combining glacier equilibrium-line altitudes and pine-tree limits: a case study from Hardangerjøkulen, central southern Norway. Holocene 6:381–398. doi:10.1177/095968369600600401
Eronen M (1979) The retreat of pine forest in Finnish Lapland since the Holocene climatic optimum: a general discussion with radiocarbon evidence from subfossil pines. Fennia 157:93–114
Eronen M, Zetterberg P, Briffa KR, Lindholm M, Meriläinen J, Timonen M (2002) The supra-long Scots pine tree-ring record for Finnish Lapland: part 1, chronology construction and initial inferences. Holocene 12:673–680. doi:10.1191/0959683602hl580rp
Grove JM (2001) The initiation of the “Little Ice Age” in regions around the North Atlantic. Clim Change 48:53–82. doi:10.1023/A:1005662822136
Grove JM, Switsur R (1994) Glacial geological evidence for the Medieval warm period. Clim Change 26:143–169. doi:10.1007/BF01092411
Grudd H (2008) Torneträsk tree-ring width and density AD 500-2004: a test of climatic sensitivity and a new 1500-year reconstruction of north Fennoscandian summers. Clim Dyn. doi:10.1007/s00382-007-0358-2
Grudd H, Briffa KR, Karlén W, Bartholin TS, Jones PD, Kromer B (2002) A 7400-year tree-ring chronology in northern Swedish Lapland: natural climatic variability expressed on annual to millennial timescales. Holocene 12:643–656. doi:10.1191/0959683602hl578rp
Hammarlund D, Björck S, Buchardt B, Israelson C, Thomsen CT (2003) Rapid hydrological changes during the Holocene revealed by stable isotope records of lacustrine carbonates from Lake Igelsjön, southern Sweden. Quat Sci Rev 22:353–370. doi:10.1016/S0277-3791(02)00091-4
Heegaard E (2003) CagedepthR.txt—R function for age-depth relationship estimation. http://www.bio.uu.nl/~palaeo/Congressen/Holivar/Literature_Holivar2003.htm
Heegaard E, Birks HJB, Telford RJ (2005) Relationships between calibrated ages and depth in stratigraphical sequences: an estimate procedure by mixed-effect regression. Holocene 15:612–618. doi:10.1191/0959683605hl836rr
Helama S, Lindholm M, Timonen M, Eronen M (2004) Dendrochronologically dated changes in the limit of pine in northernmost Finland during the past 7.5 millennia. Boreas 33:250–259. doi:10.1080/03009480410001253
Helama S, Timonen M, Lindholm M, Meriläinen J, Eronen M (2005) Extracting long-period climate fluctuations from tree-ring chronologies over timescales of centuries to millennia. Int J Climatol 25:1767–1779. doi:10.1002/joc.1215
Hicks S (2001) The use of annual arboreal pollen deposition values for delimiting tree-lines in the landscape and exploring models of pollen dispersal. Rev Palaeobot Palynol 117:1–29. doi:10.1016/S0034-6667(01)00074-4
IPCC (2007) Climate change 2007: the physical science basis. Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge
Jensen C, Vorren K-D, Mørkved B (2007) Annual pollen accumulation rate (PAR) at the boreal and alpine forest-line of north-western Norway, with special emphasis on Pinus sylvestris and Betula pubescens. Rev Palaeobot Palynol 144:337–361. doi:10.1016/j.revpalbo.2006.08.006
Johnsen SJ, Dahl-Jensen D, Gundestrup N, Steffensen JP, Clausen HB, Miller H, Masson-Delmotte V, Sveinbjornsdottir AE, White J (2001) Oxygen isotope and palaeotemperature records from six Greenland ice-core stations: Camp Century, Dye-3, GRIP, GISP2, Renland and NorthGRIP. J Quat Sci 16:299–307. doi:10.1002/jqs.622
Juggins S (2003) C2. A program for analysing and visualising palaeoenvironmental data. Version 1.3. University of Newcastle, UK
Korhola A, Weckström J, Holmström L, Erästö P (2000) A quantitative Holocene climatic record from diatoms in Northern Fennoscandia. Quat Res 54:284–294. doi:10.1006/qres.2000.2153
Kultti S, Mikkola K, Virtanen T, Timonen M, Eronen M (2006) Past changes in the Scots pine forest line and climate in Finnish Lapland: a study based on megafossils, lake sediments, and GIS-based vegetation and climate data. Holocene 16:381–391. doi:10.1191/0959683606hl934rp
Lamb HH (1965) The early medieval warm epoch and its sequel. Palaeogeogr Palaeoclimatol Palaeoecol 1:13–37. doi:10.1016/0031-0182(65)90004-0
Lamb HH (1997) Climate, history and the modern world. Routledge, London
Larsen LB, Vinther BM, Briffa KR, Melvin TM, Clausen HB, Jones PD et al (2008) New ice core evidence for a volcanic cause of the AD 536 dust veil. Geophys Res Lett 35:L04708. doi:10.1029/2007GL032450
Lie Ø, Dahl SO, Nesje A, Matthews JA, Sandvold S (2004) Holocene fluctuations of a polythermal glacier in high-alpine eastern Jotunheimen, central-southern Norway. Quat Sci Rev 23:1925–1945. doi:10.1016/j.quascirev.2004.03.012
Mann M, Bradley RS, Hughes MK (1999) Northern hemisphere temperatures during the past millennium: inferences, uncertainties, and limitations. Geophys Res Lett 26:759–762. doi:10.1029/1999GL900070
Moen A (1998) Vegetasjonsatlas for Norge: vegetasjon. Norwegian Mapping Authority, Hønefoss
Nesje A, Dahl SO (2003) The “Little Ice Age”—only temperature? Holocene 13:139–145. doi:10.1191/0959683603hl603fa
Nesje A, Dahl SO, Andersson C, Matthews JA (2000) The lacustrine sedimentary sequence in Sygneskardvatnet, western Norway: a continuous, high-resolution record of the Jostedalsbreen ice cap during the Holocene. Quat Sci Rev 19:1047–1065. doi:10.1016/S0277-3791(99)00090-6
Nesje A, Matthews JA, Dahl SO, Berrisford MS, Andersson C (2001) Holocene glacier fluctuation of Flatebreen and winter-precipitation changes in the Jostedalsbreen region, western Norway, based on glaciolacustrine sediment records. Holocene 11:267–280. doi:10.1191/095968301669980885
Rosqvist GC, Leng MJ, Jonsson C (2007) North Atlantic region atmospheric circulation dynamics inferred from a late-Holocene lacustrine carbonate isotope record, northern Swedish Lapland. Holocene 17:867–873. doi:10.1177/0959683607080508
Seppä H (1996) Post-glacial dynamics of vegetation and tree-lines in the far north of Fennoscandia. Fennia 174:1–96
Seppä H (1998) Postglacial trends in palynological richness in the northern Fennoscandian tree-line area and their ecological interpretation. Holocene 8:43–53. doi:10.1191/095968398674096317
Seppä H, Birks HJB (2001) July mean temperature and annual precipitation trends during the Holocene in the Fennoscandian tree-line area: pollen-based reconstructions. Holocene 11:527–539. doi:10.1191/095968301680223486
Seppä H, Birks HJB (2002) Holocene climate reconstructions from the Fennoscandian tree-line area based on pollen data from Toskaljavri. Quat Res 57:191–199. doi:10.1006/qres.2001.2313
Seppä H, Hicks S (2006) Integration of modern and past pollen accumulation rate (PAR) records across the arctic tree-line: a method for more precise vegetation reconstructions. Quat Sci Rev 25:1501–1516. doi:10.1016/j.quascirev.2005.12.002
Seppä H, Weckström J (1999) Holocene vegetational and limnological changes in the Fennoscandian tree-line area as documented by pollen and diatom records from Lake Tsuolbmajavri, Finland. Ecoscience 6:621–635
Seppä H, Nyman M, Korhola A, Weckström J (2002) Changes of treelines and alpine vegetation in relation to post-glacial climate dynamics in northern Fennscandia based on pollen and chironomid records. J Quat Sci 17:287–301. doi:10.1002/jqs.678
Seppä H, Birks HJB, Odland A, Poska A, Veski S (2004) A modern pollen—climate calibration set from northern Europe: developing and testing a tool for palaeoclimatological reconstructions. J Biogeogr 31:251–267. doi:10.1111/j.1365-2699.2004.00923.x
Seppä H, MacDonald GM, Birks HJB, Gervais BR, Snyder JA (2008) Late-Quaternary summer temperature changes in the northern-European tree-line region. Quat Res 69:404–412. doi:10.1016/j.yqres.2008.02.002
Stuiver M, Reimer PJ (1993) Extended 14C data base and revised CALIB 3.0 14C calibration program. Radiocarbon 35:215–230
Stuiver M, Reimer PJ, Bard E, Beck JW, Burr GS, Hughen KA et al (1998) INTCAL 98 radiocarbon age calibration, 24 000–0 cal BP. Radiocarbon 40:1041–1083
Telford RJ, Heegaard E, Birks HJB (2004) All age-depth models are wrong: but how badly? Quat Sci Rev 23:1–5. doi:10.1016/j.quascirev.2003.11.003
ter Braak CJF, Juggins S (1993) Weighted averaging partial least squares regression (WA-PLS): an improved method for reconstructing environmental variables from species assemblages. Hydrobiologia 269/270:485–502. doi:10.1007/BF00028046
Weckström J, Korhola A, Erästö P, Holmström L (2006) Temperature patterns over the eight past centuries in Northern Fennoscandia inferred from sedimentary diatoms. Quat Res 66:78–86. doi:10.1016/j.yqres.2006.01.005
Acknowledgements
We thank Cathy Jenks for preparing Fig. 1. Sylvia M. Peglar is thanked for providing unpublished pollen data. Financial support was provided by the Norwegian Research Council for the work in northern Norway and northern Sweden. H. S. acknowledges financial support from the Academy of Finland (HOT-project). We are grateful to the three anonymous reviewers and Darrell Kaufman for their helpful comments. This is publication no. A 194 from the Bjerknes Centre for Climate Research.
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This is one of fourteen papers published in a special issue dedicated to reconstructing late Holocene climate change from Arctic lake sediments. The special issue is a contribution to the International Polar Year and was edited by Darrell Kaufman.
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Bjune, A.E., Seppä, H. & Birks, H.J.B. Quantitative summer-temperature reconstructions for the last 2000 years based on pollen-stratigraphical data from northern Fennoscandia. J Paleolimnol 41, 43–56 (2009). https://doi.org/10.1007/s10933-008-9254-y
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DOI: https://doi.org/10.1007/s10933-008-9254-y